2 * PF_INET6 socket protocol family
3 * Linux INET6 implementation
6 * Pedro Roque <roque@di.fc.ul.pt>
8 * Adapted from linux/net/ipv4/af_inet.c
11 * piggy, Karl Knutson : Socket protocol table
12 * Hideaki YOSHIFUJI : sin6_scope_id support
13 * Arnaldo Melo : check proc_net_create return, cleanups
15 * This program is free software; you can redistribute it and/or
16 * modify it under the terms of the GNU General Public License
17 * as published by the Free Software Foundation; either version
18 * 2 of the License, or (at your option) any later version.
21 #define pr_fmt(fmt) "IPv6: " fmt
23 #include <linux/module.h>
24 #include <linux/capability.h>
25 #include <linux/errno.h>
26 #include <linux/types.h>
27 #include <linux/socket.h>
29 #include <linux/kernel.h>
30 #include <linux/timer.h>
31 #include <linux/string.h>
32 #include <linux/sockios.h>
33 #include <linux/net.h>
34 #include <linux/fcntl.h>
36 #include <linux/interrupt.h>
37 #include <linux/proc_fs.h>
38 #include <linux/stat.h>
39 #include <linux/init.h>
40 #include <linux/slab.h>
42 #include <linux/inet.h>
43 #include <linux/netdevice.h>
44 #include <linux/icmpv6.h>
45 #include <linux/netfilter_ipv6.h>
50 #include <net/udplite.h>
53 #include <net/protocol.h>
54 #include <net/inet_common.h>
55 #include <net/route.h>
56 #include <net/transp_v6.h>
57 #include <net/ip6_route.h>
58 #include <net/addrconf.h>
59 #include <net/ndisc.h>
60 #ifdef CONFIG_IPV6_TUNNEL
61 #include <net/ip6_tunnel.h>
64 #include <asm/uaccess.h>
65 #include <linux/mroute6.h>
67 #ifdef CONFIG_ANDROID_PARANOID_NETWORK
68 #include <linux/android_aid.h>
70 static inline int current_has_network(void)
72 return in_egroup_p(AID_INET) || capable(CAP_NET_RAW);
75 static inline int current_has_network(void)
81 MODULE_AUTHOR("Cast of dozens");
82 MODULE_DESCRIPTION("IPv6 protocol stack for Linux");
83 MODULE_LICENSE("GPL");
85 /* The inetsw6 table contains everything that inet6_create needs to
88 static struct list_head inetsw6[SOCK_MAX];
89 static DEFINE_SPINLOCK(inetsw6_lock);
91 struct ipv6_params ipv6_defaults = {
96 static int disable_ipv6_mod;
98 module_param_named(disable, disable_ipv6_mod, int, 0444);
99 MODULE_PARM_DESC(disable, "Disable IPv6 module such that it is non-functional");
101 module_param_named(disable_ipv6, ipv6_defaults.disable_ipv6, int, 0444);
102 MODULE_PARM_DESC(disable_ipv6, "Disable IPv6 on all interfaces");
104 module_param_named(autoconf, ipv6_defaults.autoconf, int, 0444);
105 MODULE_PARM_DESC(autoconf, "Enable IPv6 address autoconfiguration on all interfaces");
107 static __inline__ struct ipv6_pinfo *inet6_sk_generic(struct sock *sk)
109 const int offset = sk->sk_prot->obj_size - sizeof(struct ipv6_pinfo);
111 return (struct ipv6_pinfo *)(((u8 *)sk) + offset);
114 static int inet6_create(struct net *net, struct socket *sock, int protocol,
117 struct inet_sock *inet;
118 struct ipv6_pinfo *np;
120 struct inet_protosw *answer;
121 struct proto *answer_prot;
122 unsigned char answer_flags;
123 int try_loading_module = 0;
126 if (protocol < 0 || protocol >= IPPROTO_MAX)
129 if (!current_has_network())
132 /* Look for the requested type/protocol pair. */
134 err = -ESOCKTNOSUPPORT;
136 list_for_each_entry_rcu(answer, &inetsw6[sock->type], list) {
139 /* Check the non-wild match. */
140 if (protocol == answer->protocol) {
141 if (protocol != IPPROTO_IP)
144 /* Check for the two wild cases. */
145 if (IPPROTO_IP == protocol) {
146 protocol = answer->protocol;
149 if (IPPROTO_IP == answer->protocol)
152 err = -EPROTONOSUPPORT;
156 if (try_loading_module < 2) {
159 * Be more specific, e.g. net-pf-10-proto-132-type-1
160 * (net-pf-PF_INET6-proto-IPPROTO_SCTP-type-SOCK_STREAM)
162 if (++try_loading_module == 1)
163 request_module("net-pf-%d-proto-%d-type-%d",
164 PF_INET6, protocol, sock->type);
166 * Fall back to generic, e.g. net-pf-10-proto-132
167 * (net-pf-PF_INET6-proto-IPPROTO_SCTP)
170 request_module("net-pf-%d-proto-%d",
172 goto lookup_protocol;
178 if (sock->type == SOCK_RAW && !kern && !capable(CAP_NET_RAW))
181 sock->ops = answer->ops;
182 answer_prot = answer->prot;
183 answer_flags = answer->flags;
186 WARN_ON(!answer_prot->slab);
189 sk = sk_alloc(net, PF_INET6, GFP_KERNEL, answer_prot, kern);
193 sock_init_data(sock, sk);
196 if (INET_PROTOSW_REUSE & answer_flags)
197 sk->sk_reuse = SK_CAN_REUSE;
200 inet->is_icsk = (INET_PROTOSW_ICSK & answer_flags) != 0;
202 if (SOCK_RAW == sock->type) {
203 inet->inet_num = protocol;
204 if (IPPROTO_RAW == protocol)
208 sk->sk_destruct = inet_sock_destruct;
209 sk->sk_family = PF_INET6;
210 sk->sk_protocol = protocol;
212 sk->sk_backlog_rcv = answer->prot->backlog_rcv;
214 inet_sk(sk)->pinet6 = np = inet6_sk_generic(sk);
216 np->mcast_hops = IPV6_DEFAULT_MCASTHOPS;
218 np->pmtudisc = IPV6_PMTUDISC_WANT;
219 sk->sk_ipv6only = net->ipv6.sysctl.bindv6only;
221 /* Init the ipv4 part of the socket since we can have sockets
222 * using v6 API for ipv4.
229 inet->mc_list = NULL;
232 if (net->ipv4.sysctl_ip_no_pmtu_disc)
233 inet->pmtudisc = IP_PMTUDISC_DONT;
235 inet->pmtudisc = IP_PMTUDISC_WANT;
237 * Increment only the relevant sk_prot->socks debug field, this changes
238 * the previous behaviour of incrementing both the equivalent to
239 * answer->prot->socks (inet6_sock_nr) and inet_sock_nr.
241 * This allows better debug granularity as we'll know exactly how many
242 * UDPv6, TCPv6, etc socks were allocated, not the sum of all IPv6
243 * transport protocol socks. -acme
245 sk_refcnt_debug_inc(sk);
247 if (inet->inet_num) {
248 /* It assumes that any protocol which allows
249 * the user to assign a number at socket
250 * creation time automatically shares.
252 inet->inet_sport = htons(inet->inet_num);
253 sk->sk_prot->hash(sk);
255 if (sk->sk_prot->init) {
256 err = sk->sk_prot->init(sk);
258 sk_common_release(sk);
270 /* bind for INET6 API */
271 int inet6_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
273 struct sockaddr_in6 *addr = (struct sockaddr_in6 *)uaddr;
274 struct sock *sk = sock->sk;
275 struct inet_sock *inet = inet_sk(sk);
276 struct ipv6_pinfo *np = inet6_sk(sk);
277 struct net *net = sock_net(sk);
283 /* If the socket has its own bind function then use it. */
284 if (sk->sk_prot->bind)
285 return sk->sk_prot->bind(sk, uaddr, addr_len);
287 if (addr_len < SIN6_LEN_RFC2133)
290 if (addr->sin6_family != AF_INET6)
291 return -EAFNOSUPPORT;
293 addr_type = ipv6_addr_type(&addr->sin6_addr);
294 if ((addr_type & IPV6_ADDR_MULTICAST) && sock->type == SOCK_STREAM)
297 snum = ntohs(addr->sin6_port);
298 if (snum && snum < PROT_SOCK && !ns_capable(net->user_ns, CAP_NET_BIND_SERVICE))
303 /* Check these errors (active socket, double bind). */
304 if (sk->sk_state != TCP_CLOSE || inet->inet_num) {
309 /* Check if the address belongs to the host. */
310 if (addr_type == IPV6_ADDR_MAPPED) {
313 /* Binding to v4-mapped address on a v6-only socket
316 if (sk->sk_ipv6only) {
321 /* Reproduce AF_INET checks to make the bindings consistent */
322 v4addr = addr->sin6_addr.s6_addr32[3];
323 chk_addr_ret = inet_addr_type(net, v4addr);
324 if (!net->ipv4.sysctl_ip_nonlocal_bind &&
325 !(inet->freebind || inet->transparent) &&
326 v4addr != htonl(INADDR_ANY) &&
327 chk_addr_ret != RTN_LOCAL &&
328 chk_addr_ret != RTN_MULTICAST &&
329 chk_addr_ret != RTN_BROADCAST) {
330 err = -EADDRNOTAVAIL;
334 if (addr_type != IPV6_ADDR_ANY) {
335 struct net_device *dev = NULL;
338 if (__ipv6_addr_needs_scope_id(addr_type)) {
339 if (addr_len >= sizeof(struct sockaddr_in6) &&
340 addr->sin6_scope_id) {
341 /* Override any existing binding, if another one
342 * is supplied by user.
344 sk->sk_bound_dev_if = addr->sin6_scope_id;
347 /* Binding to link-local address requires an interface */
348 if (!sk->sk_bound_dev_if) {
352 dev = dev_get_by_index_rcu(net, sk->sk_bound_dev_if);
359 /* ipv4 addr of the socket is invalid. Only the
360 * unspecified and mapped address have a v4 equivalent.
362 v4addr = LOOPBACK4_IPV6;
363 if (!(addr_type & IPV6_ADDR_MULTICAST)) {
364 if (!net->ipv6.sysctl.ip_nonlocal_bind &&
365 !(inet->freebind || inet->transparent) &&
366 !ipv6_chk_addr(net, &addr->sin6_addr,
368 err = -EADDRNOTAVAIL;
376 inet->inet_rcv_saddr = v4addr;
377 inet->inet_saddr = v4addr;
379 sk->sk_v6_rcv_saddr = addr->sin6_addr;
381 if (!(addr_type & IPV6_ADDR_MULTICAST))
382 np->saddr = addr->sin6_addr;
384 /* Make sure we are allowed to bind here. */
385 if ((snum || !inet->bind_address_no_port) &&
386 sk->sk_prot->get_port(sk, snum)) {
387 inet_reset_saddr(sk);
392 if (addr_type != IPV6_ADDR_ANY) {
393 sk->sk_userlocks |= SOCK_BINDADDR_LOCK;
394 if (addr_type != IPV6_ADDR_MAPPED)
398 sk->sk_userlocks |= SOCK_BINDPORT_LOCK;
399 inet->inet_sport = htons(inet->inet_num);
400 inet->inet_dport = 0;
401 inet->inet_daddr = 0;
409 EXPORT_SYMBOL(inet6_bind);
411 int inet6_release(struct socket *sock)
413 struct sock *sk = sock->sk;
419 ipv6_sock_mc_close(sk);
422 ipv6_sock_ac_close(sk);
424 return inet_release(sock);
426 EXPORT_SYMBOL(inet6_release);
428 void inet6_destroy_sock(struct sock *sk)
430 struct ipv6_pinfo *np = inet6_sk(sk);
432 struct ipv6_txoptions *opt;
434 /* Release rx options */
436 skb = xchg(&np->pktoptions, NULL);
440 skb = xchg(&np->rxpmtu, NULL);
444 /* Free flowlabels */
445 fl6_free_socklist(sk);
447 /* Free tx options */
449 opt = xchg((__force struct ipv6_txoptions **)&np->opt, NULL);
451 atomic_sub(opt->tot_len, &sk->sk_omem_alloc);
455 EXPORT_SYMBOL_GPL(inet6_destroy_sock);
458 * This does both peername and sockname.
461 int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
462 int *uaddr_len, int peer)
464 struct sockaddr_in6 *sin = (struct sockaddr_in6 *)uaddr;
465 struct sock *sk = sock->sk;
466 struct inet_sock *inet = inet_sk(sk);
467 struct ipv6_pinfo *np = inet6_sk(sk);
469 sin->sin6_family = AF_INET6;
470 sin->sin6_flowinfo = 0;
471 sin->sin6_scope_id = 0;
473 if (!inet->inet_dport)
475 if (((1 << sk->sk_state) & (TCPF_CLOSE | TCPF_SYN_SENT)) &&
478 sin->sin6_port = inet->inet_dport;
479 sin->sin6_addr = sk->sk_v6_daddr;
481 sin->sin6_flowinfo = np->flow_label;
483 if (ipv6_addr_any(&sk->sk_v6_rcv_saddr))
484 sin->sin6_addr = np->saddr;
486 sin->sin6_addr = sk->sk_v6_rcv_saddr;
488 sin->sin6_port = inet->inet_sport;
490 sin->sin6_scope_id = ipv6_iface_scope_id(&sin->sin6_addr,
491 sk->sk_bound_dev_if);
492 *uaddr_len = sizeof(*sin);
495 EXPORT_SYMBOL(inet6_getname);
497 int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
499 struct sock *sk = sock->sk;
500 struct net *net = sock_net(sk);
504 return sock_get_timestamp(sk, (struct timeval __user *)arg);
507 return sock_get_timestampns(sk, (struct timespec __user *)arg);
512 return ipv6_route_ioctl(net, cmd, (void __user *)arg);
515 return addrconf_add_ifaddr(net, (void __user *) arg);
517 return addrconf_del_ifaddr(net, (void __user *) arg);
519 return addrconf_set_dstaddr(net, (void __user *) arg);
521 if (!sk->sk_prot->ioctl)
523 return sk->sk_prot->ioctl(sk, cmd, arg);
528 EXPORT_SYMBOL(inet6_ioctl);
530 const struct proto_ops inet6_stream_ops = {
532 .owner = THIS_MODULE,
533 .release = inet6_release,
535 .connect = inet_stream_connect, /* ok */
536 .socketpair = sock_no_socketpair, /* a do nothing */
537 .accept = inet_accept, /* ok */
538 .getname = inet6_getname,
539 .poll = tcp_poll, /* ok */
540 .ioctl = inet6_ioctl, /* must change */
541 .listen = inet_listen, /* ok */
542 .shutdown = inet_shutdown, /* ok */
543 .setsockopt = sock_common_setsockopt, /* ok */
544 .getsockopt = sock_common_getsockopt, /* ok */
545 .sendmsg = inet_sendmsg, /* ok */
546 .recvmsg = inet_recvmsg, /* ok */
547 .mmap = sock_no_mmap,
548 .sendpage = inet_sendpage,
549 .splice_read = tcp_splice_read,
551 .compat_setsockopt = compat_sock_common_setsockopt,
552 .compat_getsockopt = compat_sock_common_getsockopt,
556 const struct proto_ops inet6_dgram_ops = {
558 .owner = THIS_MODULE,
559 .release = inet6_release,
561 .connect = inet_dgram_connect, /* ok */
562 .socketpair = sock_no_socketpair, /* a do nothing */
563 .accept = sock_no_accept, /* a do nothing */
564 .getname = inet6_getname,
565 .poll = udp_poll, /* ok */
566 .ioctl = inet6_ioctl, /* must change */
567 .listen = sock_no_listen, /* ok */
568 .shutdown = inet_shutdown, /* ok */
569 .setsockopt = sock_common_setsockopt, /* ok */
570 .getsockopt = sock_common_getsockopt, /* ok */
571 .sendmsg = inet_sendmsg, /* ok */
572 .recvmsg = inet_recvmsg, /* ok */
573 .mmap = sock_no_mmap,
574 .sendpage = sock_no_sendpage,
576 .compat_setsockopt = compat_sock_common_setsockopt,
577 .compat_getsockopt = compat_sock_common_getsockopt,
581 static const struct net_proto_family inet6_family_ops = {
583 .create = inet6_create,
584 .owner = THIS_MODULE,
587 int inet6_register_protosw(struct inet_protosw *p)
589 struct list_head *lh;
590 struct inet_protosw *answer;
591 struct list_head *last_perm;
592 int protocol = p->protocol;
595 spin_lock_bh(&inetsw6_lock);
598 if (p->type >= SOCK_MAX)
601 /* If we are trying to override a permanent protocol, bail. */
604 last_perm = &inetsw6[p->type];
605 list_for_each(lh, &inetsw6[p->type]) {
606 answer = list_entry(lh, struct inet_protosw, list);
608 /* Check only the non-wild match. */
609 if (INET_PROTOSW_PERMANENT & answer->flags) {
610 if (protocol == answer->protocol)
620 /* Add the new entry after the last permanent entry if any, so that
621 * the new entry does not override a permanent entry when matched with
622 * a wild-card protocol. But it is allowed to override any existing
623 * non-permanent entry. This means that when we remove this entry, the
624 * system automatically returns to the old behavior.
626 list_add_rcu(&p->list, last_perm);
629 spin_unlock_bh(&inetsw6_lock);
633 pr_err("Attempt to override permanent protocol %d\n", protocol);
637 pr_err("Ignoring attempt to register invalid socket type %d\n",
641 EXPORT_SYMBOL(inet6_register_protosw);
644 inet6_unregister_protosw(struct inet_protosw *p)
646 if (INET_PROTOSW_PERMANENT & p->flags) {
647 pr_err("Attempt to unregister permanent protocol %d\n",
650 spin_lock_bh(&inetsw6_lock);
651 list_del_rcu(&p->list);
652 spin_unlock_bh(&inetsw6_lock);
657 EXPORT_SYMBOL(inet6_unregister_protosw);
659 int inet6_sk_rebuild_header(struct sock *sk)
661 struct ipv6_pinfo *np = inet6_sk(sk);
662 struct dst_entry *dst;
664 dst = __sk_dst_check(sk, np->dst_cookie);
667 struct inet_sock *inet = inet_sk(sk);
668 struct in6_addr *final_p, final;
671 memset(&fl6, 0, sizeof(fl6));
672 fl6.flowi6_proto = sk->sk_protocol;
673 fl6.daddr = sk->sk_v6_daddr;
674 fl6.saddr = np->saddr;
675 fl6.flowlabel = np->flow_label;
676 fl6.flowi6_oif = sk->sk_bound_dev_if;
677 fl6.flowi6_mark = sk->sk_mark;
678 fl6.fl6_dport = inet->inet_dport;
679 fl6.fl6_sport = inet->inet_sport;
680 fl6.flowi6_uid = sk->sk_uid;
681 security_sk_classify_flow(sk, flowi6_to_flowi(&fl6));
684 final_p = fl6_update_dst(&fl6, rcu_dereference(np->opt),
688 dst = ip6_dst_lookup_flow(sk, &fl6, final_p);
690 sk->sk_route_caps = 0;
691 sk->sk_err_soft = -PTR_ERR(dst);
695 ip6_dst_store(sk, dst, NULL, NULL);
700 EXPORT_SYMBOL_GPL(inet6_sk_rebuild_header);
702 bool ipv6_opt_accepted(const struct sock *sk, const struct sk_buff *skb,
703 const struct inet6_skb_parm *opt)
705 const struct ipv6_pinfo *np = inet6_sk(sk);
708 if (((opt->flags & IP6SKB_HOPBYHOP) &&
709 (np->rxopt.bits.hopopts || np->rxopt.bits.ohopopts)) ||
710 (ip6_flowinfo((struct ipv6hdr *) skb_network_header(skb)) &&
711 np->rxopt.bits.rxflow) ||
712 (opt->srcrt && (np->rxopt.bits.srcrt ||
713 np->rxopt.bits.osrcrt)) ||
714 ((opt->dst1 || opt->dst0) &&
715 (np->rxopt.bits.dstopts || np->rxopt.bits.odstopts)))
720 EXPORT_SYMBOL_GPL(ipv6_opt_accepted);
722 static struct packet_type ipv6_packet_type __read_mostly = {
723 .type = cpu_to_be16(ETH_P_IPV6),
727 static int __init ipv6_packet_init(void)
729 dev_add_pack(&ipv6_packet_type);
733 static void ipv6_packet_cleanup(void)
735 dev_remove_pack(&ipv6_packet_type);
738 static int __net_init ipv6_init_mibs(struct net *net)
742 net->mib.udp_stats_in6 = alloc_percpu(struct udp_mib);
743 if (!net->mib.udp_stats_in6)
745 net->mib.udplite_stats_in6 = alloc_percpu(struct udp_mib);
746 if (!net->mib.udplite_stats_in6)
747 goto err_udplite_mib;
748 net->mib.ipv6_statistics = alloc_percpu(struct ipstats_mib);
749 if (!net->mib.ipv6_statistics)
752 for_each_possible_cpu(i) {
753 struct ipstats_mib *af_inet6_stats;
754 af_inet6_stats = per_cpu_ptr(net->mib.ipv6_statistics, i);
755 u64_stats_init(&af_inet6_stats->syncp);
759 net->mib.icmpv6_statistics = alloc_percpu(struct icmpv6_mib);
760 if (!net->mib.icmpv6_statistics)
762 net->mib.icmpv6msg_statistics = kzalloc(sizeof(struct icmpv6msg_mib),
764 if (!net->mib.icmpv6msg_statistics)
765 goto err_icmpmsg_mib;
769 free_percpu(net->mib.icmpv6_statistics);
771 free_percpu(net->mib.ipv6_statistics);
773 free_percpu(net->mib.udplite_stats_in6);
775 free_percpu(net->mib.udp_stats_in6);
779 static void ipv6_cleanup_mibs(struct net *net)
781 free_percpu(net->mib.udp_stats_in6);
782 free_percpu(net->mib.udplite_stats_in6);
783 free_percpu(net->mib.ipv6_statistics);
784 free_percpu(net->mib.icmpv6_statistics);
785 kfree(net->mib.icmpv6msg_statistics);
788 static int __net_init inet6_net_init(struct net *net)
792 net->ipv6.sysctl.bindv6only = 0;
793 net->ipv6.sysctl.icmpv6_time = 1*HZ;
794 net->ipv6.sysctl.flowlabel_consistency = 1;
795 net->ipv6.sysctl.auto_flowlabels = IP6_DEFAULT_AUTO_FLOW_LABELS;
796 net->ipv6.sysctl.idgen_retries = 3;
797 net->ipv6.sysctl.idgen_delay = 1 * HZ;
798 net->ipv6.sysctl.flowlabel_state_ranges = 0;
799 atomic_set(&net->ipv6.fib6_sernum, 1);
801 err = ipv6_init_mibs(net);
804 #ifdef CONFIG_PROC_FS
805 err = udp6_proc_init(net);
808 err = tcp6_proc_init(net);
811 err = ac6_proc_init(net);
817 #ifdef CONFIG_PROC_FS
823 ipv6_cleanup_mibs(net);
828 static void __net_exit inet6_net_exit(struct net *net)
830 #ifdef CONFIG_PROC_FS
835 ipv6_cleanup_mibs(net);
838 static struct pernet_operations inet6_net_ops = {
839 .init = inet6_net_init,
840 .exit = inet6_net_exit,
843 static const struct ipv6_stub ipv6_stub_impl = {
844 .ipv6_sock_mc_join = ipv6_sock_mc_join,
845 .ipv6_sock_mc_drop = ipv6_sock_mc_drop,
846 .ipv6_dst_lookup = ip6_dst_lookup,
847 .udpv6_encap_enable = udpv6_encap_enable,
848 .ndisc_send_na = ndisc_send_na,
852 static int __init inet6_init(void)
857 sock_skb_cb_check_size(sizeof(struct inet6_skb_parm));
859 /* Register the socket-side information for inet6_create. */
860 for (r = &inetsw6[0]; r < &inetsw6[SOCK_MAX]; ++r)
863 if (disable_ipv6_mod) {
864 pr_info("Loaded, but administratively disabled, reboot required to enable\n");
868 err = proto_register(&tcpv6_prot, 1);
872 err = proto_register(&udpv6_prot, 1);
874 goto out_unregister_tcp_proto;
876 err = proto_register(&udplitev6_prot, 1);
878 goto out_unregister_udp_proto;
880 err = proto_register(&rawv6_prot, 1);
882 goto out_unregister_udplite_proto;
884 err = proto_register(&pingv6_prot, 1);
886 goto out_unregister_ping_proto;
888 /* We MUST register RAW sockets before we create the ICMP6,
889 * IGMP6, or NDISC control sockets.
893 goto out_unregister_raw_proto;
895 /* Register the family here so that the init calls below will
896 * be able to create sockets. (?? is this dangerous ??)
898 err = sock_register(&inet6_family_ops);
900 goto out_sock_register_fail;
903 * ipngwg API draft makes clear that the correct semantics
904 * for TCP and UDP is to consider one TCP and UDP instance
905 * in a host available by both INET and INET6 APIs and
906 * able to communicate via both network protocols.
909 err = register_pernet_subsys(&inet6_net_ops);
911 goto register_pernet_fail;
925 ipv6_stub = &ipv6_stub_impl;
927 err = ipv6_netfilter_init();
930 /* Create /proc/foo6 entries. */
931 #ifdef CONFIG_PROC_FS
933 if (raw6_proc_init())
935 if (udplite6_proc_init())
936 goto proc_udplite6_fail;
937 if (ipv6_misc_proc_init())
938 goto proc_misc6_fail;
942 err = ip6_route_init();
945 err = ndisc_late_init();
947 goto ndisc_late_fail;
948 err = ip6_flowlabel_init();
950 goto ip6_flowlabel_fail;
951 err = addrconf_init();
955 /* Init v6 extension headers. */
956 err = ipv6_exthdrs_init();
958 goto ipv6_exthdrs_fail;
960 err = ipv6_frag_init();
964 /* Init v6 transport protocols. */
969 err = udplitev6_init();
977 err = ipv6_packet_init();
979 goto ipv6_packet_fail;
986 err = ipv6_sysctl_register();
998 ipv6_packet_cleanup();
1008 ipv6_exthdrs_exit();
1012 ip6_flowlabel_cleanup();
1014 ndisc_late_cleanup();
1016 ip6_route_cleanup();
1018 #ifdef CONFIG_PROC_FS
1021 ipv6_misc_proc_exit();
1023 udplite6_proc_exit();
1028 ipv6_netfilter_fini();
1036 unregister_pernet_subsys(&inet6_net_ops);
1039 register_pernet_fail:
1040 sock_unregister(PF_INET6);
1041 rtnl_unregister_all(PF_INET6);
1042 out_sock_register_fail:
1044 out_unregister_ping_proto:
1045 proto_unregister(&pingv6_prot);
1046 out_unregister_raw_proto:
1047 proto_unregister(&rawv6_prot);
1048 out_unregister_udplite_proto:
1049 proto_unregister(&udplitev6_prot);
1050 out_unregister_udp_proto:
1051 proto_unregister(&udpv6_prot);
1052 out_unregister_tcp_proto:
1053 proto_unregister(&tcpv6_prot);
1056 module_init(inet6_init);
1058 MODULE_ALIAS_NETPROTO(PF_INET6);